The beta has now been released as v4.5.9I expect zipping and unzipping will have no real limits anymore. There was a bug in both plugins that caused them to "loose position" for truly large files (~4gb seems to be the limit, but it also depended on the amount of free memory). The current version reads "chunks" of the file to compress and writes them to the ZIP immediately.This new technique might cause slightly less compression on large files.

I just tested v4.6 with an 8GB file and it zipped fine. Also, the zip task had only the following changes for 4.6:* new copyright statement (include 2010)* it now writes the new zip filename to the history db